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PPM stands for Portable Pixmap, and it is a simple image format that is part of the Netpbm package. The PPM format stores color images in a plain text or binary format, representing pixel values with three numbers for red, green, and blue color channels. PPM files are easy to read and understand, but they can be large in size as they do not employ any form of compression, resulting in each pixel being represented by full color intensity values.

The RAW image file format is a generic term for a variety of image formats used by different digital camera manufacturers. RAW files store unprocessed data from the camera's sensor, providing photographers with the ability to manipulate settings like exposure, white balance, and sharpness during post-processing, which can result in higher image quality. Unlike JPEG and other compressed formats, RAW files retain a much broader range of color and luminance values, offering more flexibility for editing but also resulting in larger file sizes.